JAPANESE MOLLUSKS, PECTENACEA. 143 



Specimens collected at the last named locality much exceed 

 Dunker's type in size, measuring 35 mm. from beaks to lower mar- 

 gin. The species is unusually equilateral for Lima. 

 Lima japonica (A. Ad.) Sowerby, Conch. Icon., XVIII, pi. 5, f. 21 (1872). 



Japan (Sowerby). 

 Lima lima Linne. (L. squamosa Lam.). 



Yokohama (Stearns) ; Nagasaki (Lischke). 



I can see no difference whatever between the Japanese and Med- 

 iterranean specimens of this species, except that the former are 

 larger, measuring as much as 75 mm. from beaks to ventral margin. 

 This species extends eastward in the Pacific to the Viti Islands. 



Lima goliath Sowerby. P. Z. S., 1883, p. 30, pi. 7, f. 3. 



Japan (Sowerby) ; S.-E. Nippon, 775 fathoms (Challenger). 



SPONDYLIDJE. 



Spondylus regius Linne. Inland Sea (Stearns). 

 Spondylus sinensis Sowb. Thes., I, p. 427, pi. 87, f. 32-34. 



Inland Sea (Stearns) ; Nagasaki (Lischke). 

 Spondylus nudus Chemn. Ibid, pi. 88, f. 39, 40. 



Wakayama, Inland Sea (Dkr.). 

 Spondylus cruentus Lischke. J. M. C., I, p. 172, pi. 12, f. 1-5. 



Nagasaki (Lischke) ; Sagami (Stearns). 

 Plicatula cuneata Dkr. Index, p. 246, pi. 11, f. 3. 



Japan (Dkr.). 



Plicatula murioata A. Ad. Ibid, pi. 11, f. 4. Japan (Dkr.). 

 Plicatula horrida Dkr. Ibid, p. 247, pi. 11, f. 6, 7. 



Japan (Dkr.). 

 Plicatula irregularis Dkr. (rugosa Dkr. not Lam.). Ibid, p. 247, pi. 11, f. 5. 



Japan (Dkr.). 

 Plicatula simplex Gld. Otia Conch., p. 178. 



Kagoshima Bay and Simoda, 5-20 fath. (Stimpson). 

 PECTENID.E. 



Pecten crassicostatus Sowerby. Dkr., Index, pi. 13, f. 28-f-P. nobilis Reeve, 

 Conch. Icon., VIII, f. 3. 



Ise (Stearns) ; Yedo, Nagasaki (Lischke). 



Pecten squamatus Gmelin. Dkr., Index, p. 240, pi. 11, f. 14. 

 Sagama Bay (Stearns); Bay of Yedo (Lischke). 



